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Giovanni's Nidoqueen [1st Edition] #23

Giovanni's Nidoqueen [1st Edition] #23

Pokemon Gym Challenge · #23 · Oct 2000

Buy Raw on eBayPSA 10 Sold on eBay
Shop on TCGPlayer

Maybe — Proceed with Caution

Should You Grade?

Raw Price
$33.47
Expected Value
$58.59
Net Profit
$181.52
Gem Rate
32.3%
ROI
+375%
Sales / Yr
90

The gem rate is only 32% — you'll need a very clean copy to hit PSA 10. Only 90 sales per year — it may take time to find a buyer at full price.

Best Tier for Flipping

TAG Basic$22.00/card · 30+ business days
Net Profit $42.50
Per-Flip ROI 127%
Annualized 2,340%
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Factors in grading cost, turnaround time, and compounding — how fast you can reinvest profits into the next flip.

Profitability by Grading Company

CompanyBest TierGem RatePop10sCostEVNet ProfitROI
PSAPSA Standard52.3%8,4201,250$20.00$85.40$32.50127%
BGSBGS Standard52.3%8,4201,250$20.00$85.40$32.50127%
CGCCGC Standard52.3%8,4201,250$20.00$85.40$32.50127%
SGCSGC Standard52.3%8,4201,250$20.00$85.40$32.50127%
TAGTAG Standard52.3%8,4201,250$20.00$85.40$32.50127%
Compare All Companies with Pro →

Shows the best-value tier from each grading company based on EV, cost, and turnaround. Pop = total graded population; 10s = grade 10 count.

Price by Grade

Raw
$33.47
BGS 10
$315.00
PSA 10
$242.23
CGC 10
$229.99
SGC 10
$145.00
9
$55.70
BGS 9.5
$52.00
8
$35.00
7
$23.75
View Sold PSA 10 Prices on PriceCharting →View Grading Data on GemRate →
0%100%
32.3%Gem Rate (PSA 10)
+5 graded in 30 days
+13 in 90 days

Grade Distribution (443 total graded)

443Total
PSA 1014332.3%
PSA 920345.8%
PSA 86614.9%
PSA 7122.7%
Below 7194.3%

eBay Market Signals

3–4 month horizon
Raw
30 days tracked
Active
42
30-day avg listings
Sold/day
2.4
84 resolved
Days to sell
7.0d
p90 21d
Liquidity
62%
sold ÷ listed
Supply 30d
+12.0%
Price 30d
+8.0%
PSA 10
30 days tracked
Active
11
30-day avg listings
Sold/day
0.30
14 resolved
Days to sell
18d
p90 46d
Liquidity
48%
sold ÷ listed
Supply 30d
-6.0%
Price 30d
+14.0%
Unlock with Pro →
© 2026 Should You Grade? Data from PriceCharting & GemRate.
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